English verb conjugation
MUST KRASS

Regular verb: krass - krassed - krassed

Affirmation

Simple form	V-ing form
I must krass you must krass he must krass we must krass you must krass they must krass	I must be krassing you must be krassing he must be krassing we must be krassing you must be krassing they must be krassing
Perfect	V-ing perfect
I must have krassed you must have krassed he must have krassed we must have krassed you must have krassed they must have krassed	I must have been krassing you must have been krassing he must have been krassing we must have been krassing you must have been krassing they must have been krassing

Negation

Simple form	V-ing form
I mustn't krass you mustn't krass he mustn't krass we mustn't krass you mustn't krass they mustn't krass	I mustn't be krassing you mustn't be krassing he mustn't be krassing we mustn't be krassing you mustn't be krassing they mustn't be krassing
Perfect	V-ing perfect
I mustn't have krassed you mustn't have krassed he mustn't have krassed we mustn't have krassed you mustn't have krassed they mustn't have krassed	I mustn't have been krassing you mustn't have been krassing he mustn't have been krassing we mustn't have been krassing you mustn't have been krassing they mustn't have been krassing

Interrogative form

Simple form	V-ing form
must I krass? must you krass? must he krass? must we krass? must you krass? must they krass?	must I be krassing? must you be krassing? must he be krassing? must we be krassing? must you be krassing? must they be krassing?
Perfect	V-ing perfect
must I have krassed? must you have krassed? must he have krassed? must we have krassed? must you have krassed? must they have krassed?	must I have been krassing? must you have been krassing? must he have been krassing? must we have been krassing? must you have been krassing? must they have been krassing?

Interro-negative form

Simple form	V-ing form
mustn't I krass? mustn't you krass? mustn't he krass? mustn't we krass? mustn't you krass? mustn't they krass?	mustn't I be krassing? mustn't you be krassing? mustn't he be krassing? mustn't we be krassing? mustn't you be krassing? mustn't they be krassing?
Perfect	V-ing perfect
mustn't I have krassed? mustn't you have krassed? mustn't he have krassed? mustn't we have krassed? mustn't you have krassed? mustn't they have krassed?	mustn't I have been krassing? mustn't you have been krassing? mustn't he have been krassing? mustn't we have been krassing? mustn't you have been krassing? mustn't they have been krassing?